#include "Add.h"
#include "Sub.h"
#include "Mul.h"


int main()
{
    int a = 10;
    int b = 20;

    printf("a + b = %d\n", add(a,b));
    printf("a - b = %d\n", sub(a,b));
    printf("a * b = %d\n", mul(a,b));

    return 0;
}
